// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GL_GL_SURFACE_WGL_H_
#define UI_GL_GL_SURFACE_WGL_H_

#include "base/macros.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gl/gl_surface.h"

namespace gfx {

// Base interface for WGL surfaces.
class GL_EXPORT GLSurfaceWGL : public GLSurface {
public:
    GLSurfaceWGL();

    // Implement GLSurface.
    void* GetDisplay() override;

    static bool InitializeOneOff();
    static void InitializeOneOffForTesting();
    static HDC GetDisplayDC();

protected:
    ~GLSurfaceWGL() override;

private:
    DISALLOW_COPY_AND_ASSIGN(GLSurfaceWGL);
};

// A surface used to render to a view.
class NativeViewGLSurfaceWGL : public GLSurfaceWGL {
public:
    explicit NativeViewGLSurfaceWGL(gfx::AcceleratedWidget window);

    // Implement GLSurface.
    bool Initialize(GLSurface::Format format) override;
    void Destroy() override;
    bool IsOffscreen() override;
    gfx::SwapResult SwapBuffers() override;
    gfx::Size GetSize() override;
    void* GetHandle() override;

private:
    ~NativeViewGLSurfaceWGL() override;

    gfx::AcceleratedWidget window_;
    gfx::AcceleratedWidget child_window_;
    HDC device_context_;

    DISALLOW_COPY_AND_ASSIGN(NativeViewGLSurfaceWGL);
};

// A surface used to render to an offscreen pbuffer.
class PbufferGLSurfaceWGL : public GLSurfaceWGL {
public:
    explicit PbufferGLSurfaceWGL(const gfx::Size& size);

    // Implement GLSurface.
    bool Initialize(GLSurface::Format format) override;
    void Destroy() override;
    bool IsOffscreen() override;
    gfx::SwapResult SwapBuffers() override;
    gfx::Size GetSize() override;
    void* GetHandle() override;

private:
    ~PbufferGLSurfaceWGL() override;

    gfx::Size size_;
    HDC device_context_;
    void* pbuffer_;

    DISALLOW_COPY_AND_ASSIGN(PbufferGLSurfaceWGL);
};

} // namespace gfx

#endif // UI_GL_GL_SURFACE_WGL_H_
